Power supply device



FIG. 1 is a top, front, right side perspective view of a power supply device, showing my new design;

FIG. 2 is a bottom, rear, left side perspective view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a rear elevational view thereof; and,

FIG. 8 is a front elevation view thereof.

The broken lines in the drawings show portions of the power supply device which form no part of the claimed design. 

CLAIM I claim the ornamental design for a power supply device, as shown and described. 